Electric switch.



J. A. 031301111. ELEOTRIG SWITCH.

APPLICATION FILED JUNE 1, 1911.

1,109,595. 1 v Patented Sept. 1, 1914.

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aosnrrr A. 'osnoim, or" ST. LOUIS, MISSOURI, ASSIGNOR T AMERICAN can AND ropnnmr COMPANY, on ST. LOUIS, MISSOURI. A CORPORATION or NEW JERSEY.

To all whom it may concern:

Be it known that I, JOSEPH A. Os soRN, residing at 915 Olive street, St. LouisyMissouri, 7 and being a citizen of the United States, have invented certain new and useful Improvements in Electric Switches,-ofi

which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it'appertains to make and to use the same, reference being had to the accompanyin drawings, which illustrate the preferred- Form of the inven'-' tion, though itis to be understood that the invention is'not limited to the exact details of construction shown and described, as 'it is obvious that various modifications thereof will-occur 'to=persons skilled-in the art;

Insaid drawings: Figure 1 is an elevational view of a switch constructed in accordance with the invention, the electrodes being shown out of contact. Fig. 2 is a view similar to iFig. 1 but illustrating the electrodes in contact, so that the electric current may pass from one electrode into the other: Fig. 3 is an elevational view taken at right angles to that shown n Figs. 1, and2. Fig. dis a top plan view partly in section on line 4 4, of Fig. 1. Fig. 5 is a The invention relates particularly to an electric switch wherein the contact is made by the pressure of a foot of the operator upon one end of a suitably arranged lever or treadle and is particularly useful in connection with the operation of hand operated electric welding tools because of the fact that it permits the operator to have full control of the. current supplied tosuch tool without disengaging his hands from the tool.

The object of the invention is to provide a switch of simple and substantial and prop- ELECTRIC SWITCH.

Specification of Letters Patent. Patented ge t. 1 1914 Application filed June 1, 1911.

Serial No. 630,706.

erly insulated construction wherein the vanous elements are arranged in such manner that those parts which are most apt to be damaged are set upon one side of a protecting wall or baseboard while the operating medium projects through said board so as to be engaged by the foot of an operator.

' A further object is to provide means for removably retaining the opposite electrodes in their respective positions in such manner thatthey may be adjusted to compensate wear, particularly at the point of contact. A further object is to provide an adjustable stop for limiting the possible out-ofcontact movement of one of the electrodes. A further'object is to so support the protecting wall or baseboard that: the same may be swung to a reversed position so that the parts of the switch which are carried upon its protected side are brought into an exposed position so as to facilitate the'making of repairs, for making adjustments, etc.

With these and other objects in view the invention comprises a baseboard 1 preferably pivotally secured at its upper edge to a substantial support as 2, through the medium of brackets 33, in such manner that it may be swung upwardly about its pivot for exposing its rear side.

A stationary stop 4 is fixed to the support 2 and depends therefrom and is disposed so as to be engaged by the baseboard 1 for limiting the swinging movement thereof in one direction. Upon the protected or rear side of the baseboard 1, is fixed a laterally projecting bracket 5, at the outer end of which is formed a clamp 6 adapted to receive and hold an electrode 7. Suitable bolt and nut connection is comprised in the clamp At the point of connection between the clamp 10, and the end of the lever 9, the opposing surfaces of said two members are formed with miniature teeth or are otherwise roughened so as to augment the frictional engagement with a fiber insulating washer lfwhich is arranged between the two surfaces. A bolt 13 is extended through the washer and through the adjacent portions of the clamp and lever and a suitable insulating sleeve 13" and washer Hare arranged for preventing the travel of the electric current from the clamp 10 into the lever 9. The head of the bolt engages the washer l4 and the opposite end of the bolt is thread.- ed and fitted with-a suitable nut 13*. the nut is tightened the teeth upon lever 9 and the clamp 10 sink more or less into opposite sides of the fiber washer 12 and serve to prevent any possible accidental relative movement of the parts. The forward end of the lever 9 extends through a vertical slot 15 formed in the baseboard 1, and that portion of said lever which projects beyond the forward face of said baseboard, is forme with a foot treadle as 16.

An adjustable stop 17 is fixed to the forward face of the baseboard 1, by the bolts 18-18, which serve to secure the bracket 5 to the rear side of said board. A longitudinal adjusting slot 19 is formed in the stop 17 for the passage of the bolts 18 and the lower end of said stop is offset and is adapted to be engaged by the upper surface of the treadle end of the lever 9 for limiting the upward movement of said treadle and consequently the spread of the electrodes 7 and 11. The bolts 18-18 are thoroughly insulated from the bracket 5 by insulating sleeves and washers as at 5-5 as is clearly indicated in Fig. 1. Conductors 20, 21 lead to the bracket 5 and to the clamp 10 respectively so that when the electrodes 11 and 7 are brought into contact, by a downward movement of the treadle 16, the current will be free to flow from the conductor 20 through the bracket 5, clamp 6, and electrode 7 to the electrode 11, and thence through. the clamp 10 and through the conductor 21. A tension spring 22 is fixed to the treadle end of the lever 9 and is disposed for normally maintaining the electrodes in out-of-contact relation.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is r '1. In an electric switch, a freely swinging base-board hinged horizontally to present opposite sides, a bracket fixed to one side of said baseboard, an electrode in said bracket, a second electrode adapted to be moved into contact with said first electrode, means disposed upon the opposite side of said base-board for maintaining said When electrodes electrically disconnected, and

means projecting through said base-board pivotally connected to said electrode adapted for moving said second electrode into contact with said first electrode.

2. In an electric switch, a swinging support, a pair of brackets fixed to one side of said swinging support, an electrode carried by one of said brackets, a lever pivotally mounted upon. the other bracket and extending beyond said support, a second electrode connected to one end of said, lever, a foot treadle formed upon the opposite end of said lever whereby said second electrode may be moved into contact with said first electrode, and means for maintaining said electrodes separated.

3. In an electric switch, a swingin support including a clamp, an electro e ad justably mounted on said clamp, a conductor electrically connected to said electrode, amember movable relative to said swinging support, a clamp connected to and movable with said member, an electrode adjustably mounted on said clamp, and a conductor electrically connected to said second electrode and insulated from the movable member.

4. In an electric switch, an oscillatory member, a clamp thereon, an electrode carried by said clamp, an actuating extension on said oscillatory member, a bolt constituting a pivotal connection between said member and clamp, a member insulating said bolt from said oscillatory member, sald insulating member having a portion disposed between said oscillatory member and clamp and means co-acting with said bolt adapted I to frictionally fasten in fixed relation said oscillatory member, said portion of said insulating member and said clamp.

5. In an electric switch, an oscillatory member, a clamp thereon, an electrode carried by said clamp, a pivotal connection between said member and clamp, a member insulating said connection from said oscillatory member, said insulating member extending between said oscillatory member and clamp, means acting on said connection to frictionally clamp together said oscillatory member, insulating member and clamp, anda conductor attached by said last mentioned means to said pivotal connection.

6. In an electric switch, an oscillatory member, an electrode, a carrying device therefor lapping said oscillatory member, a pivoting bolt passing through said member and device, the side ofeither said member or device facing, respectively, said device or member being roughened, an insulating sleeve surrounding said bolt and an insulatin' piece disposed between said member an device, a nut on said bolt adapted to clamp said member, insulating Tn witness whereof I have hereunto set piece and deviee, a swinging support and a my hand in the presence of two Witnesses. second electrode in operative relation to the first mentioned electrode supported by said JOSEPH OSBORN' 5 swinging support and adapted to be swung Witnesses:

out of operative relation with said first GEO. WM. BROWN, mentioned electrode. I YVONNE DU GUAY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. C. 

